[Closed] Insurance with bikes *and home working*

so, we've been with M&S for the past few years as their cover is excellent. Policy is up for renewal so I'm scouting around for quotes. I'm hitting two problems

1) the value of our bikes is more than most insurers will accept
2) Mrs NBT works from home. Since she makes curtains this is more than just "clerical" and hence requires special intervention or something.

M&S have covered us in the past, but their renewal is over £680, whereas the online price is closer to £400, so worth shopping around

anyone got any other ideas?